TAMPER-EVIDENT LID FOR A CONTAINER
A lid and a combination of a tub and the lid, the lid comprising a web and a circumferential skirt depending thereon; wherein the skirt comprises at least one tab, a first retention tooth and a second retention tooth, the first retention tooth being molded on an inner surface of the tab; and wherein for positioning the lid in a first closed position on the tub, the first and the second retention teeth are engaged under a top lip of the tub by applying a pressure on the lid; when first opening the tub once the lid is in the first closed position, the tab is broken free from the skirt into a position of the tab in which the tab remains pivotably attached to the skirt, and the tab is pulled, causing disengagement of the first retention tooth from under the top lip of the tub, the second retention tooth acting as a pivoting axis for the lid.
This application claims benefit of U.S. provisional application Ser. No. 63/109,915, filed on Nov. 5, 2020. All documents above are incorporated herein in their entirety by reference.
FIELD OF THE INVENTIONThe present disclosure relates to tamper-evident tubs. More specifically, the present disclosure is concerned with a tamper-evident lid for a tub.
BACKGROUND OF THE INVENTIONTamper indicators are used in product tubs so that users know if the product has been tampered with prior to first opening of the tubs. Tamper-evident lids typically require that the tamper indicator be removed, and generally discarded separately, after first opening. Generally, tamper indicators are not designed to prevent tampering, but to indicate whether tampering has occurred.
There is still a need in the art for a tamper-evident lid for a tub.
SUMMARY OF THE INVENTIONMore specifically, in accordance with the present invention, there is provided a combination of a tub and a lid, the lid comprising a web and a circumferential skirt depending thereon; wherein the skirt comprises at least one tab, a first retention tooth and a second retention tooth, the first retention tooth being molded on an inner surface of the tab; and wherein for positioning the lid in a first closed position on the tub, the first and the second retention teeth are engaged under a top lip of the tub by applying a pressure on the lid; when first opening the tub once the lid is in the first closed position, the tab is broken free from the skirt into a position of the tab in which the tab remains pivotably attached to the skirt, and the tab is pulled, causing disengagement of the first retention tooth from under the top lip of the tub, the second retention tooth acting as a pivoting axis for the lid.
There is further provided a lid for a tub, the lid comprising a skirt, a first retention tooth on a tab defined on the skirt by lines of weakness, and a second retention tooth on the skirt; wherein, in a first closed position of the lid on top of the tub prior to first opening of the tub, the first and the second retention teeth are engaged under a top lip of the tub; and wherein, from the first closed position, the skirt is broken along the lines of weakness by pulling on the tab, the tab remaining pivotably connected to the lid, and pulling on the tab disengages the first retention tooth from the top lip of the tub, and pivots the lid about the second retention tooth away from the top of the tub and, in a continuous movement in one single motion, disengagement of the second retention tooth from the top lip of the tub.
Other objects, advantages and features of the present invention will become more apparent upon reading of the following non-restrictive description of specific embodiments thereof, given by way of example only with reference to the accompanying drawings.
In the appended drawings:
A combination according to an embodiment of an aspect of the present disclosure comprises a lid and a tub; the lid has a shape configured for engagement with the tub as described hereinbelow.
In an embodiment illustrated in
The lid 4 comprises a web 40, with an end-wall 31 on an outer perimeter thereof, of a shape generally spanning the open top T of the tub 5 (see for example in
In a closed position prior to first opening, the first and second retention teeth 2, 3 are engaged under the tub top lip 8 when the lid 4 is in position over the open top T of the tub 5. The tab 1 of length 7 (see
To close the tub 5, the lid 4 is positioned over the open top T of the tub 5, the first and second retention teeth 2, 3 are engaged under the top lip 8 of the tub 5 by applying a pressure on the lid 4. To open the tub once the lid is thus retained on top of the tub (see
As shown in
The position and geometry of the line of weakness 30 and the position of formation of the live-hinge 17 are selected to generate a localised and precise tearing of the skirt 41 and pivoting movement of the tab 1, while preventing weakening of the live hinge 17 upon use, and retention of the tab 1 on the skirt 41.
The first retention tooth 2 and the second retention tooth 3 are integrally molded into the skirt 41 and configured to engage under the tub top lip 8, so that the lid 4 cannot be removed from the top of the tub 5 without disengaging them.
The second retention tooth 3 is positioned generally opposite the position of the skirt 41 which is torn upon first opening, i.e. opposite the first retention tooth 2 on the skirt 41, and allows pivoting movement of the lid once the first retention tooth is disengaged from the top lip of the tub as described hereinabove. The second retention tooth 3 may also be molded as part of a second retention tab (not shown). More than one second retention tooth may be provided, depending on the geometry of the tub and its open top; to increase retention on a tub of a larger size for example, separate secondary retention teeth may be provided on the lid opposite the first retention tooth.
Following the first opening, the lid may be repositioned and hold in place by reengagement of the second retention tooth under the top lip of the container. As shown in
The first retention tooth 2 illustrated in
The second retention tooth 3 illustrated in
The line of weakness 30 was described hereinabove with a L-shape; other shapes may be contemplated (
The top lip 8 of the tub may be a generally round lip (see
The lid as illustrated herein is an integrally molded plastic one-piece lid. Alternatively, composite lid comprising a molded skirt and a fused paperboard web may be contemplated. The tub may be made of paperboard or in molded plastic or other materials.
The tub and lid combination is illustrated herein in a rectangular or oval geometry; referred to in the art as “non-round”; other geometries may be contemplated, such as round, rectangular and square. Rounds combination are illustrated for example in
As people in the art will now be in a position to appreciate, the lid of the present combination comprises non-detachable tamper-evident elements, in such a way that the combination may be reused after first opening, allowing opening et reclosing of the lid. The lid comprises a tab, a first retention tooth and an opposite retention tooth 3, and opening is done by lifting the tab to initiate a pivoting movement of the lid causing disengagement of the first retention tooth upon first opening and, in sequence, disengagement of the second retention tooth in a continuous movement in one single motion, in absence of detached parts that would need to be disposed of, thereby reducing littering.
The scope of the claims should not be limited by the embodiments set forth in the examples, but should be given the broadest interpretation consistent with the description as a whole.
Claims
1. A combination of a tub and a lid, the lid comprising a web and a circumferential skirt depending thereon; wherein the skirt comprises at least one tab, a first retention tooth and a second retention tooth;
- wherein the first retention tooth is molded on an inner surface of the tab; and
- wherein:
- i) for positioning the lid in a first closed position on the tub, the first and the second retention teeth are engaged under a top lip of the tub by applying a pressure on the lid;
- ii) when first opening the tub once the lid is in the first closed position, the tab is broken free from the skirt into a position of the tab in which the tab remains pivotably attached to the skirt, and the tab is pulled, causing disengagement of the first retention tooth from under the top lip of the tub, the second retention tooth acting as a pivoting axis for the lid.
2. The combination of claim 1, wherein:
- iii) further pulling on the tab pivots the lid up and away from the tub until disengagement of the second retention tooth from under the top lip of the tub; and
- iii) once the tub is thus first opened, the lid is replaceable in a closed position by applying a pressure on the lid to reengage the second retention tooth under the top lip of the tub.
3. The combination of claim 1, wherein the skirt further comprises at least one secondary retention rib on an inner surface thereof; and wherein:
- iii) further pulling on the tab pivots the lid up and away from the tub until disengagement of the second retention tooth from the top lip of the tub; and
- iv) once the tub is thus first opened, the lid is replaceable in the closed position by applying a pressure on the lid to reengage the second retention tooth and the at least one secondary retention rib under the top lip of the tub.
4. The combination of claim 1, wherein the second retention tooth and the tab are integrally molded in the skirt.
5. The combination of claim 1, wherein the tab is defined by a line of weakness in the skirt prior to first opening of the tub, the line of weakness is broken when first opening the tub by pulling the tab.
6. The combination of claim 1, wherein the tab is defined by a line of weakness in the skirt prior to first opening of the tub, the line of weakness is broken when first opening the tub by pulling the tab, and the lid becomes pivotable about the second retention tooth until disengagement of the second retention tooth from under the top lip of the tub.
7. The combination of claim 1, wherein, from the open position of the tub, the second retention teeth engages under the top lip of the tub by applying a pressure on the lid.
8. The combination of claim 1, wherein, from the first closed position, the first retention teeth disengages from the top lip of the tub by detaching the tab from the skirt into a pivotable position in which the tab, further pulled, initiates a pivoting movement of the lid, the pivoting motion of the lid under further pulling the tab causing disengagement of the second retention tooth from under the top lip of the tub.
9. The combination of claim 1, wherein, from the first closed position prior to first opening of the tub, pulling the tab causes breaking the skirt along a line of weakness initially defining the tab on the skirt and detaching the tab from the skirt, thereby disengaging the first retention tooth from under the top lip of the tub, into a position in which the tab, still connected to the skirt by a resulting live-hinge, is further pulled to disengage the second retention tooth from under the top lip of the tub.
10. The combination of claim 1, wherein the second retention tooth is positioned generally opposite the first retention tooth on the skirt.
11. The combination of claim 1, wherein the first retention tooth comprises a bottom wall at an angle relative to a normal to an inner surface of the tab.
12. The combination of claim 1, wherein the first retention tooth is a hollow tooth.
13. The combination of claim 1, wherein the second retention tooth comprises a bottom wall at an angle relative to a normal to an inner surface of the tab.
14. The combination of claim 1, wherein the second retention tooth is a hollow tooth.
15. The combination of claim 1, wherein the lid is a one-piece lid, integrally made of molded plastic.
16. The combination of claim 1, wherein the skirt is molded and the web is a paperboard web.
17. The combination of claim 1, wherein the tub is made in one of: i) paperboard and ii) plastic.
18. The combination of claim 1, wherein the combination has one of a rectangular geometry, an oval geometry, a round geometry, and a square geometry.
19. A lid for a tub, the lid comprising a skirt, a first retention tooth on a tab defined on the skirt by lines of weakness, and a second retention tooth on the skirt;
- wherein, in a first closed position of the lid on top of the tub prior to first opening, the first and the second retention teeth are engaged under a top lip of the tub; and
- wherein, from the first closed position, the skirt is broken along the lines of weakness by pulling on the tab, the tab remaining pivotably connected to the lid, pulling on the tab disengages the first retention tooth from under the top lip of the tub, and pivots the lid about the second retention tooth away from the top of the tub until disengagement of the second retention tooth from the top lip of the tub.
20. The tamper-evident lid of claim 19, wherein the skirt further comprises at least one secondary retention rib on an inner surface thereof; and once the tub is opened, the lid is positioned in a closed position by applying a pressure on the lid to reengage the second retention tooth and the at least one secondary retention rib under the top lip of the tub.
Type: Application
Filed: Nov 3, 2021
Publication Date: May 5, 2022
Inventors: Philippe NOËL (Lévis), Denis LEHOUILLIER (Lévis)
Application Number: 17/453,467